2813889 has 16 divisors (see below), whose sum is σ = 4217472. Its totient is φ = 1655808.

The previous prime is 2813879. The next prime is 2813897. The reversal of 2813889 is 9883182.

It is not a de Polignac number, because 2813889 - 2⁸ = 2813633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2813809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672 + ... + 2465.

It is an arithmetic number, because the mean of its divisors is an integer number (263592).

2^2813889 is an apocalyptic number.

2813889 is the 897-th nonagonal number.

It is an amenable number.

2813889 is a deficient number, since it is larger than the sum of its proper divisors (1403583).

2813889 is a wasteful number, since it uses less digits than its factorization.

2813889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176.

The product of its digits is 27648, while the sum is 39.

The square root of 2813889 is about 1677.4650517969. The cubic root of 2813889 is about 141.1786378242.

The spelling of 2813889 in words is "two million, eight hundred thirteen thousand, eight hundred eighty-nine".